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Searching for additive outliers in nonstationary time series
Perron, Pierre, (2000)
The effects of different types of outliers on unit root tests
Yin, Yong, (1998)
Unit root tests in the presence of innovational outliers
Lanne, Markku, (2001)
Comparison of unit root tests for time series with level shifts
Lanne, Markku, (1999)
Test procedures for unit roots in time series with level shifts at unknown time